Emprechtinger, M., Lis, D. C., Bell, T., Phillips, T. G., Schilke, P., Comito, C., Rolffs, R., van der Tak, F., Ceccarelli, C., Aarts, H., Bacmann, A., Baudry, A., Benedettini, M., Bergin, E. A., Blake, G., Boogert, A., Bottinelli, S., Cabrit, S., Caselli, P., Castets, A., Caux, E., Cernicharo, J., Codella, C., Coutens, A., Crimier, N., Demyk, K., Dominik, C., Encrenaz, P., Falgarone, E., Fuente, A., Gerin, M., Goldsmith, P., Helmich, F., Hennebelle, P., Henning, T., Herbst, E., Hily-Blant, P., Jacq, T., Kahane, C., Kama, M., Klotz, A., Kooi, J., Langer, W., Lefloch, B., Loose, A., Lord, S., Lorenzani, A., Maret, S., Melnick, G., Neufeld, D., Nisini, B., Ossenkopf, V., Pacheco, S., Pagani, L., Parise, B., Pearson, J., Risacher, C., Salez, M., Saraceno, P., Schuster, K., Stutzki, J., Tielens, X., van der Wiel, M., Vastel, C., Viti, S., Wakelam, V., Walters, A., Wyrowski, F. and Yorke, H. (2010). The distribution of water in the high-mass star-forming region NGC 6334 I. Astron. Astrophys., 521. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 0004-6361

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Abstract

Aims. We present observations of twelve rotational transitions of (H2O)-O-16, (H2O)-O-18, and (H2O)-O-17 toward the massive star-forming region NGC 6334 I, carried out with Herschel/HIFI as part of the guaranteed time key program Chemical HErschel Surveys of Star forming regions (CHESS). We analyze these observations to obtain insights into physical processes in this region. Methods. We identify three main gas components (hot core, cold foreground, and outflow) in NGC 6334 I and derive the physical conditions in these components. Results. The hot core, identified by the emission in highly excited lines, shows a high excitation temperature of similar to 200 K, whereas water in the foreground component is predominantly in the ortho-and para-ground states. The abundance of water varies between 4 x 10(-5) (outflow) and 10(-8) (cold foreground gas). This variation is most likely due to the freeze-out of water molecules onto dust grains. The (H2O)-O-18/(H2O)-O-17 abundance ratio is 3.2, which is consistent with the O-18/O-17 ratio determined from CO isotopologues. The ortho/para ratio in water appears to be relatively low (1.6 +/- 1) in the cold, quiescent gas, but close to the equilibrium value of three in the warmer outflow material (2.5 +/- 0.8).

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Emprechtinger, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lis, D. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bell, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Phillips, T. G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schilke, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Comito, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rolffs, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
van der Tak, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ceccarelli, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Aarts, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bacmann, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Baudry, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Benedettini, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bergin, E. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blake, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Boogert, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bottinelli, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cabrit, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Caselli, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Castets, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Caux, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cernicharo, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Codella, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Coutens, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Crimier, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Demyk, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dominik, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Encrenaz, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Falgarone, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fuente, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gerin, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Goldsmith, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Helmich, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hennebelle, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Henning, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Herbst, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hily-Blant, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jacq, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kahane, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kama, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Klotz, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kooi, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Langer, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lefloch, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Loose, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lord, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lorenzani, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Maret, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Melnick, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Neufeld, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nisini, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ossenkopf, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pacheco, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pagani, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Parise, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pearson, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Risacher, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Salez, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Saraceno, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schuster, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stutzki, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tielens, X.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
van der Wiel, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vastel, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Viti, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wakelam, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Walters, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wyrowski, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yorke, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-494798
DOI: 10.1051/0004-6361/201015086
Journal or Publication Title: Astron. Astrophys.
Volume: 521
Date: 2010
Publisher: EDP SCIENCES S A
Place of Publication: LES ULIS CEDEX A
ISSN: 0004-6361
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
INTERSTELLAR-MEDIUM; NGC-6334; MASERS; I(N); PROTOSTARS; HIFI; ABUNDANCES; MILLIMETER; OUTFLOW; AMMONIAMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/49479

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